Add lua port

Author: zekoz

src/settings.js

@@ -1367,6 +1367,10 @@ var USE_SDL_NET = 1;
 // [link]
 var USE_ICU = 0;
 
+// 1 = use lua from PUC ftp
+// [link]
+var USE_LUA = 0;
+
 // 1 = use zlib from emscripten-ports
 // [link]
 var USE_ZLIB = 0;

tools/ports/lua.py

@@ -0,0 +1,51 @@
+# Copyright 2021 The Emscripten Authors.  All rights reserved.
+# Emscripten is available under two separate licenses, the MIT license and the
+# University of Illinois/NCSA Open Source License.  Both these licenses can be
+# found in the LICENSE file.
+
+import logging
+import os
+import shutil
+
+
+VERSION = '5.4.3'
+HASH = '3a1a3ee8694b72b4ec9d3ce76705fe179328294353604ca950c53f41b41161b449877d43318ef4501fee44ecbd6c83314ce7468d7425ba9b2903c9c32a28bbc0'
+
+
+def needed(settings):
+  return settings.USE_LUA
+
+
+def get_lib_name(base_name, settings):
+  return base_name + ('-mt' if settings.USE_PTHREADS else '') + '.a'
+
+
+def get(ports, settings, shared):
+  url = 'https://www.lua.org/ftp/lua-%s.tar.gz' % VERSION
+  ports.fetch_project('lua', url, 'lua', sha512hash=HASH)
+
+  def create(final):
+    logging.info('building port: lua')
+
+    source_path = os.path.join(ports.get_dir(), 'lua', 'lua-' + VERSION, 'src')
+    dest_path = os.path.join(ports.get_build_dir(), 'lua')
+
+    shutil.rmtree(dest_path, ignore_errors=True)
+    shutil.copytree(source_path, dest_path)
+    ports.build_port(dest_path, final, [dest_path], exclude_dirs=[], flags=[])
+
+    ports.install_headers(source_path)
+
+  return [shared.Cache.get_lib('liblua.a', create)]
+
+
+def clear(ports, settings, shared):
+  shared.Cache.erase_lib('liblua.a')
+
+
+def process_args(ports):
+  return []
+
+
+def show():
+  return 'lua (USE_LUA=1; MIT License)'

tools/settings.py

@@ -31,6 +31,7 @@
     'USE_VORBIS',
     'USE_COCOS2D',
     'USE_ICU',
+    'USE_LUA',
     'USE_MODPLUG',
     'USE_SDL_MIXER',
     'USE_SDL_IMAGE',